Lesson 339 – Mechanics – Punctuation – Periods

Use a period with abbreviations used with figures showing time. Examples: A.M., P.M., B.C., and A.D.
Instructions: Put periods where needed in the following sentences.
1. I was born in A D 1940.
2. Be here at 4:30 A M , or you will not see me until 9:45 P M
3. What happened in A D 1776 that was of great importance?
4. People living in 2000 B C did not enjoy all that we have today.
5. Class starts promptly at 8:00 A M
–For answers scroll down.

1. A.D.
2. A.M. / P.M.
3. A.D.
4. B.C.
5. A.M.
(Notice that when a period is used for an abbreviation or some other reason at the end of the sentence, you do not need a second one to end the sentence. The one period does double duty.)

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from Daily Grammar Lessons Blog http://dailygrammarlessons.blogspot.com/2016/01/lesson-339-mechanics-punctuation-periods.html

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